In stock Android, clearing notifications is an all-or-nothing deal. In the CyanogenMod ROM, however, you can clear notifications one by one by swiping.

If you have a lot of notifications in your drawer, you may want to clear some, but not all of them. To clear single notifications in CyanogenMod, just pull down your notification bar and swipe to the right over those notifications. They'll disappear, leaving your notification drawer clean, but not empty, so you can come back to those important notifications later. Check out the video above for a demonstration.